Stauroneis fuegiana, a new Stauroneis species (Bacillariophyta) from Tierra del Fuego, southern Argentina

Abstract

During a survey of the freshwater aquatic diatom flora of two peat bog areas in Tierra del Fuego, southern Argentina, a new taxon belonging to the genus Stauroneis that could not be identified was observed. Based on detailed light and scanning electron microscopy observations and comparison with similar larger-celled Stauroneis species worldwide, the taxon is described as new: Stauroneis fuegiana Casa & Van de Vijver sp. nov. Stauroneis fuegiana can be distinguished based on the slightly raised marginal crest, the typical broadly lanceolate valve outline with subrostrate apices, the almost rectangular central area and its valve dimensions.Comments are made on its taxonomic position and how the new taxon can be distinguished from other larger-celled Stauroneis species. Brief notes on the ecology and distribution are added.

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“…S. anceps memiliki ciri adanya stauros (Gambar 12. ), yaitu daerah sentral tebal yang membentang (Levkov et al, 2016), bentuknya naviculoid dan soliter, panjang dan bagian ujungnya menyempit, kebanyakan linear-lanset sampai katup lanset (Casa et al, 2017).…”

Morphological and ecological characteristics of diatom species Stauroneis neofossilis Lange-Bertalot & Metzeltin 1996 (Bacillariophyceae) from Bosnia and Herzegovina

“…The genus is distinguished by uniseriate striae, navicular, single, long, narrow, generally linear-lanceolate to lanceolate valves, and a thickened center region known as a "stauros" (Casa et al, 2017). There are currently more than 800 taxa in the genus, which live in a variety of habitats such as freshwater, brackish water, marine, and coastal environments (Levkov et al, 2016).…”